Spray nozzle



SepL 17, 1957 E; A. FREDRICKSON AL I 2,805,740

' SPRAY NOZZLE Filed April 15, 1955 I l 1 iizaeza r5.

asasma SPRAY Nozzrn Edward A. Fredrickson, Chicago, Harold W. Ashby, Elmhurst, and August E. Johnson, Chicago, ilL, assignors to Crane (30., Chicago, 111., a corporation of Illinois Application April 13, E55, Serial No. 561,042

4 Ciaims. (ill. 29 ===118) This invention relates generally to a spray nozzle structure, and, more particularly, the invention is concerned with a novel type of device known as a spring-operated nozzle. I

Heretofore, one of the objections encountered in this type of nozzle has been the unsanitary and annoying drippage which usually occurs for some time after the supply valves to the nozzle are closed, and while ball discs and other forms of closure members have been used in the past for such devices, these have not been altogether successful in making the supply inlet watertight and the drippage referred to has resulted.

One of the objects, therefore, of the instant invention is to supply a spray nozzle in which substantially instantly actuated spring operation or similar resilient means may be employed to prevent dripping, whereby at the same time, upon occurrence of the conventional shutofl by means of a stop, backflow as well as said objectionable dripping is avoided.

Another object is to provide for an improved spraying or swirling means in a nozzle structure as hereinafter described whereby greater efiiciency and freedom from maintenance is obtained in the performance of the spray.

Other objects and advantages will become more readily apparent upon proceeding with the drawing, in which Fig. 1 is a preferred embodiment shown in a sectional assembly view.

Fig. 2 is a view similar to that in Fig. 1, except with the novel spray nozzle in the open or operating position.

Similar reference numerals refer to similar parts throughout the several figures.

Referring now to the drawing, the spray head, generally designated 1, is connected to a source of fluid supply, such as that illustrated in the hose 2, which is mounted over a bushing 3 and is fitted with the threads 4 for rendering a fluid tight connection by abutting the member 3 against the annular gasket 5. An adapter 6 threadedly engages the bushing 3, as shown, and such adapter is furnished with a port 7 communicating with the interior of the bushing 3 as shown. Connected in fluid sealing relation to the adapter 6 is a spray housing or body 8 connected by means of the interposed adapter 6 to the hose supply 2.

As indicated at the lower portion of the spray housing or body 8, a chamber 9 is provided to receive a coil spring form of swirling member 11 so that the periphery thereof contacts the cylindrical wall of said chamber. The latter coil or spiral member is held in predetermined length by means of a stud 12 headed as at ends 13 and 14 respectively to retain the swirling spring 11 within predetermined bounds. An outlet 16 serves as the fluid discharge aperture for body 8. Superposed within the head 13, a lighter coil spring pressure resistant member 15 is provided, the lower end limit of which is supported upon the head 13 of the stud 12. Thus the said stud serves not only to carry the member 15, but also to form nited States Patent 9 are the inner limits of the flow passage to produce the swirling spray discharge at 10. The upper end limit of spring 15 is received within the chamber 16 to resiliently carry the closure member 17, the latter member being guided for reciprocating movement as hereinafter described within the chamber 18 whereby the said adapter 6 serves as a guide for the closure member 17.

Defining the upper limits of the chamber 18, an annular seating surface 19 is provided cooperating with a similar seating surface 21 arranged to make annular contact as shown at Fig. 1 under the influence of the spring 15 and upon cessation of fluid flow through the head 1 and being unseated thereby to compress spring 15, as indicated in Fig. 2, when even slight fluid flow takes place as indicated by the arrow. It will be understood that the flow of such fluid continues within the annularly provided serrations 22 serving as ports on the periphery of the closure member 17.

At an upper end portion of the closure member 17, a grooved projection 23 projects within the port 7. To effect an annular fluid seal therearound a conventional O ring 24 is positioned as illustrated to slidingly contact the walls of the port 7 during the course of the closure member 17 returning to its seat at 19.

It will, therefore, be understood that when the closure member 17 is in the closed position as shown in Fig. 1, the O-ring 24 will serve as a fluid seal thereby supplementing that function which is provided by the cooperating annular contact surfaces 21 and 19 of the closure member and adapter 6, respectively.

It will also be appreciated that the coil spring 15 is intentionally made sufliciently light so that the severance of the contact between the seating surfaces 19 and 21 will occur under relatively low fluid line pressure. HOW? ever, at the same time, it should be understood that the said spring Will support the usual water columns or heads in the piping found on installations where a spray of this type would be used, such as cleaning equipment in hospitals and the like. As a matter of fact, with a spring of this weight being used, considerably less fluid line pressure will exist in the piping or the hose 2 between a controlling stop valve (not shown) and the spray 1.

It should be understood that while specific mention is made herein to the coil member 15, any suitable fluid pressure resistant member may be used without being beyond the purview of this contribution.

It will also be appreciated that another feature of this design of spray nozzle is to provide that the spray means and the closure member, such as 17, is incorporated in a self-contained unit which can easily be applied to existing or new fitting installations where such sprays are used.

In addition, it will also be understood that the spring operated closure member can be removed entirely without affecting objectionally the character of the stream emanating from the spray at 10.

It should accordingly be appreciated that the design of structure illustrated is capable of taking form in many difierent embodiments. It is the desire, therefore to be limited only by the spirit of the invention interpreted by the appended claims.

We claim:

1. A spray nozzle structure comprising a head having a lower chamber for effecting a spray action to fluid flowing therethrough, an adapter connected to the said head, a closure member mounted within said adapter for reciprocating movement, peripherally relieved guide means and sealing means carried on said closure mem-' ber engaging the adapter, one limit of said movement of the closure member providing for a fluid seal with an annular surface of the said adapter and pressure resistant resilient means supporting said closure member to normally return the closure member to contact said annular surface of the adapter upon cessation of fluid flow through. the nozzle structure, a coil member cooperating with a Wall portion of the lower chamber to impart a swirling motion to fluid flowing through said chamber, the said coil member carrying an axial stud extending transversely to the coils, the said resilient means being supported on an end portion of the said stud. r

2. A spray nozzle structure comprising a head having an outlet and lower chamber means within for effecting a swirling action to fluid flowing therethrough, an adapter connected to the said head, a closure member mounted within said adapter for guided reciprocating movement, one limitof said latter movement providing for a fluid seal with said adapter, pressure resistant resilient means supporting said closure member, combined sealing and seating means for saidclosure member within the adapter, and coil means within the outlet of the head having a central axially extending portion for supporting said pressure resistant resilient means and defining the swirling path of flow through said chamber means, the guide for said closure member being fluted peripherally and extending axially to permit flow therepast when the said closure member is moved axially against the biasing of said pressure resistant resilient means.

3. A spray nozzle structure comprising a head having an inlet, an outlet, and lower chamber means within for eflecting a swirling action to fluid flowing therethrough, an adapter with an inlet connected to the said head, a closure member resiliently guided within'said adapter for reciprocating movement to permit fluid flow therepast and having annular sealing means engageable .predeterminately with said adapter, a limit of said latter movement toward said adapter inlet providing for a fluid seal with said adapter, resilient means supporting said closure member, and coiled means fitted within the outlet I of said head to cooperate with the outer wall defining the head chamber and. outlet to effect the swirling action to the fluid, the said coiled means having a central stud portion projecting therethrough to support and center the said resilient means and closure member with relation to the central axis of the spray nozzle structure.

4. A spray nozzle structure comprising a head having a lower chamber with means Within said chamber for effecting a spray action to fluid flowing therethrough, an adapter member cooperating with the said head, a closure member mounted within said adapter for reciprocating movement and having sealing means movable into and out of sliding engagement with a central port within said adapter, one limit of said latter movement providing for said sliding engagement contact with said adapter member, pressure resistant resilient means supporting said closure member, spirally extending means within said head lower chamber for supporting said pressure resistant resilient means and the said closure memher, the said spirally extending support means cooperating with the wall defining the outer limits of said lower chamber'means for eflecting swirling and providing the spray action through the head, a stud member snugly received within said spirally extending support means to define the inner limits of said lower chamber means, the said stud member having end disposed spaced apart heads substantially defining therebetween the length of the said spirally extending support means.

References Cited in the file of this patent UNITED STATES PATENTS 441,048 Bacon et al. Nov. 18, 1890 664,067 Turner Dec. 18, 1900 1,146,557 Dieter -L July 13, 1915 2,572,606 Fisher l Oct. 23, 1951 2,629,376 Gallice et al. Feb. 24, 1953 2,643,915 Pieroni June 30, 1953 FOREIGN PATENTS 968,126 France Apr. 12, 1950 

